/*
 * OREKIT-X
 * Copyright 2002-2008 CS Communication & Systemes
 * 
 * Parts of this software package have been licensed to CS
 * Communication & Systemes (CS) under one or more contributor license
 * agreements.  See the NOTICE file distributed with this work for
 * additional information.
 *  
 * This is an experimental copy of OREKIT from www.orekit.org.
 * Please use the original OREKIT from orekit.org for normal work
 * unrelated to this research project.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License.  You
 * may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 */
package ore.time;

import ore.errors.OrekitException;

/** 
 * Factory pattern for defined time scales.
 * 
 * @author Luc Maisonobe
 */
public final class TimeScalesFactory
    extends Object
{
    /** 
     * @return International Atomic Time scale
     */
    public static TimeScale getTAI() {
        return TAIScale.Instance;
    }
    /** 
     * @return Universal Time Coordinate scale
     * 
     * @exception OrekitException Leap seconds cannot be read
     */
    public static TimeScale getUTC() throws OrekitException {
        return UTCScale.Instance();
    }
    /** 
     * @return Terrestrial Time scale
     */
    public static TimeScale getTT() {
        return TTScale.Instance;
    }
    /** 
     * @return Global Positioning System scale
     */
    public static TimeScale getGPS() {
        return GPSScale.Instance;
    }
    /** 
     * @return Geocentric Coordinate Time scale
     */
    public static TimeScale getTCG() {
        return TCGScale.Instance;
    }
    /** 
     * @return Barycentric Dynamic Time scale
     */
    public static TimeScale getTDB() {
        return TDBScale.Instance;
    }


    private TimeScalesFactory() {
        super();
    }
}
